Have ArrayCharSequence reuse its Array.

Your know, for performance.  Closes SI-5641.

1 files changed, 27 insertions, 0 deletions

diff --git a/test/files/run/array-charSeq.scala b/test/files/run/array-charSeq.scala
new file mode 100644
index 0000000000..f7d0586f03
--- /dev/null
+++ b/test/files/run/array-charSeq.scala
@@ -0,0 +1,27 @@
+object Test {
+  val arr = Array[Char]('a' to 'i': _*)
+  var xs: CharSequence = arr
+  val hash = xs.hashCode
+
+  def check(chars: CharSequence) {
+    println("\n[check '" + chars + "'] len = " + chars.length)
+    chars match {
+      case x: runtime.ArrayCharSequence => assert(x.xs eq arr, ((x.xs, arr)))
+      case x                            => assert(false, x)
+    }
+
+    0 until chars.length foreach { i =>
+      println("sub(%s, %s) == '%s'".format(i, chars.length, chars.subSequence(i, chars.length)))
+      println("sub(%s, %s) == '%s'".format(0, i, chars.subSequence(0, i)))
+    }
+    if (chars.length >= 2)
+      check(chars.subSequence(1, chars.length - 1))
+  }
+
+  def main(args: Array[String]): Unit = {
+    while (xs.length > 0) {
+      check(xs)
+      xs = xs.subSequence(0, xs.length - 1)
+    }
+  }
+}